KR100633799B1 - Circuit for controlling operation of a cardiopulmonary resuscitation apparatus - Google Patents

Abstract

Provided is a driving control circuit of a cardiopulmonary resuscitation device to easily control a thoracic pressure and a respiratory movement of a cardiopulmonary resuscitation device using air pressure. First, third, and ninth directional control valves(6,11,34) include directional control ports at one side thereof. The first, third, and ninth directional control valves(6,11,34) are solenoid valves having two ports respectively where air pressure is penetrated. Second, sixth, and eighth directional control valves(7,22,27) include directional control ports at both sides thereof. The second, sixth, and eighth directional control valves(7,22,27) are solenoid valves having two ports respectively where air pressure is penetrated. Directional control valves(5,9,13,21,23,25,28,33,39,41,42,43) include directional control ports at one side thereof. The directional control valves(5,9,13,21,23,25,28,33,39,41,42,43) are solenoid valves having one port respectively where air pressure is penetrated. A thoracic band tightening cylinder(157) and a locker cylinder(149) are formed as double-acting cylinders having return springs therein. Counters(26,31) are formed to connect a port A to a port P when a predetermined number of times is counted after receiving air pressure with a port Z.

Description

Circuit for controlling operation of a cardiopulmonary resuscitation apparatus

1 is a block diagram of a patient transfer device coupled to the CPR device to which the present invention is applied,

Figure 2 is a longitudinal cross-sectional view of the patient transfer device of FIG.

3 is a cross-sectional view of the patient transfer device of FIG.

4 is a drive control circuit diagram of the cardiopulmonary resuscitation device according to the present invention,

5a and 5b is a signal signal of the compression and breathing operation cycle of the drive control circuit of FIG.

<Description of Symbols for Major Parts of Drawings>

 300: compression circuit 400: breathing circuit

 3: operation selector switch 4, 40: shuttle valve

 5: 7th direction control valve 6: 1st direction control valve

 7: 2nd direction control valve 11: 3rd direction control valve

21: 8th Directional Control Valve 27: 6th Directional Control Valve

39: fourth directional control valve 41: fifth directional control valve

The present invention relates to a cardiopulmonary resuscitation device, and more particularly to a drive control circuit of the cardiopulmonary resuscitation device for controlling the operation of the chest band and chest compression device and the breathing apparatus in the cardiopulmonary resuscitation device.

In general, cardiopulmonary resuscitation is to supply the oxygenated blood flow to the whole body in place of the heart and lung function to the subjects whose heartbeat is stopped, including chest compressions and artificial respiration.

Coronary perfusion pressure should be maintained above 20 mmHg to allow spontaneous blood circulation during CPR. However, according to the conventional method of repeatedly pressing only the sternum, only about 10 to 20% of the normal heart blood flow is induced, so that the spontaneous circulation of blood flow is not sufficient. Thus, various CPR devices have been proposed to increase blood flow.

Examples thereof include Korean Patent No. 270596, Korean Patent No. 413009, Korean Patent Application No. 448449, and the like filed by the present applicant.

The Korean Patent No. 270596 has a cardiopulmonary belt having a chest band configured to supply a greater amount of blood flow by having a compression and contraction means simultaneously performing a function of a heart pump that compresses the sternum and a function of the chest pump that contracts the rib cage. Resuscitation device, Korean Patent No. 413009 and Korean Patent No. 448449 is a cardiopulmonary resuscitation device further provided with a length adjusting means that can easily adjust the length of the chest band according to the size of the subject.

However, conventional CPR devices have been operated through a motor to drive a piston to operate the compression and contraction means for compressing the rib cage.

Accordingly, an object of the present invention is to provide a drive control circuit for a cardiopulmonary resuscitation device configured to easily control the thoracic compression and respiration of the cardiopulmonary resuscitation device using air pressure.

The present invention for achieving the above object, the thoracic compression cylinder having a piston for compressing the sternum of the patient, and a thoracic belt tightening cylinder for tightening the thorax band to tighten the thorax when the compression cylinder presses the sternum; In the drive control circuit of the cardiopulmonary resuscitation apparatus having a rocker cylinder for maintaining the tightening state of the chest band,

With pneumatic tank,

A first directional control valve which opens and closes to connect the pneumatic tank and the chest compression cylinder to on / off, a second directional control valve which opens and closes to connect the pneumatic tank to the chest band tightening cylinder on / off, and A third direction control valve which opens and closes to connect the pneumatic tank and the rocker cylinder to on / off, a pressure counter valve for counting the number of times the first direction control valve is operated, and an opening and closing input port of the pressure counter valve. A compression circuit having a four-way control valve;

By operating the air pressure output when the set count of the pressure counter valve is completed, the fifth direction control valve connected to the pneumatic tank and the air pressure output from the fifth direction control valve are input at regular intervals. A breathing circuit having a sixth direction control valve to be opened and closed and a breathing counter valve counting an input frequency of air pressure input when the sixth direction control valve is opened and closed;

A tightening mode for tightening the chest band, a cardiopulmonary resuscitation mode for operating the operation of the compression circuit and the operation of the breathing circuit at predetermined times, a continuous compression mode for stopping the operation of the breathing circuit, and the cardiopulmonary resuscitation mode Has a breathing mode for stopping the operation of the thoracic compression cylinder and a stop mode for stopping the CPR mode, by selecting one of the modes to control the opening and closing of each valve constituting the compression circuit and the breathing circuit Is achieved by the operation selection switch.

The compression circuit includes a seventh direction control valve for opening and closing the output of the first direction control valve, and a first shuttle valve for outputting one of air pressure generated when one of the cardiopulmonary resuscitation mode and the breathing mode is selected. And a second shuttle valve for outputting one of the air pressure output from the first shuttle valve and the air pressure generated when the continuous compression mode is selected, and an eighth direction control valve for periodically opening and closing the seven-way control valve. And a ninth directional control valve connected between the first shuttle valve and the second shuttle valve;

The eighth direction control valve is an input port connected to an output port of the second shuttle valve, a first output port connected to one direction control port through a timer circuit, and is connected to the other direction control port through a timer circuit. It is preferable to have a second output port, and said other direction control port is connected to an input port of said pressure counter counter via said fourth direction control valve.

One direction control port of the second direction control valve is connected to the tightening mode of the operation selection switch, the other direction control port is connected to the stop mode of the operation selection switch, and the continuous pressing mode of the operation selection switch is the first mode. It is connected to the direction control port of the four-way control valve, the CPR mode of the operation selection switch is connected to one port of the first check valve, the breathing mode of the operation selection switch is the direction control of the seventh direction control valve It is preferable to be connected to the port and the other port of the first check valve.

The output port of the second direction control valve is preferably connected to the direction control port of the thorax band tightening cylinder and the direction control valve of the locking cylinder.

The pressure counter may include a 'Z' port to which an output port of the eighth directional control valve is connected, a direction control port of a ninth direction control valve provided in the compression circuit, and a direction of a fifth direction control valve provided in the breathing circuit. 'A' port connected to the control port, and 'P' port connected to the pneumatic tank, the 'A' port and the '' when the predetermined number of times by counting the air pressure input to the 'Z' port It is preferable to stop the operation of the pressing circuit by connecting the P 'port.

The respiratory frequency counter is connected to the 'Z' port through which the air pressure output from the sixth directional control valve is input, 'A' port connected to the 'Y' port for resetting the compression frequency counter, and the pneumatic tank. It has a 'P' port, it is preferable to reset the compression frequency counter by connecting the 'A' port and the 'P' port when the predetermined number of times by counting the air pressure input to the 'Z' port.

Preferably, the operation selection switch is configured as a rotary switch so that specific modes are sequentially selected as the switch is rotated.

The apparatus may further include a timer circuit configured to input the air pressure output from the second direction control valve to the chest band tightening cylinder after a predetermined time elapses.

It is preferable to further include a timer circuit for transmitting the output air pressure of the third direction control valve to the rocker cylinder after a predetermined time.

A timer circuit for inputting air pressure output from one path of the sixth directional control valve to the one direction control port of the sixth directional control valve after a predetermined time and air output from the other path of the sixth directional control valve It is preferable to further include a timer circuit for inputting the pressure to the other direction control port of the sixth direction control valve after a predetermined time.

A timer circuit for inputting air pressure output from one path of the eighth direction control valve to the one direction control port of the eighth direction control valve after a predetermined time and air output from the other path of the eighth direction control valve; It is preferable to further include a timer circuit for outputting the pressure to the other direction control port of the eighth directional control valve and the 'Z' port of the pressing frequency counter after a predetermined time.

Further comprising a pressure regulator for maintaining the input air pressure at a constant pressure, it is preferable to adjust the constant pressure.

Preferably, the first, third and tenth direction control valves are solenoid valves having only one direction control port and two ports through which air pressure passes.

Preferably, the second, sixth and eighth directional control valves are solenoid valves having directional control ports on both sides and two ports through which air pressure passes.

Preferably, the fourth, fifth, seventh, and ninth directional control valves are solenoid valves having only one direction control port and one port through which air pressure passes.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a patient transfer device coupled to the CPR device to which the present invention is applied, Figure 2 is a longitudinal cross-sectional view of the patient transfer device of Figure 1, Figure 3 is a cross-sectional view of the patient transfer device of FIG. As shown in FIG. 1 (wiring, piping, and chest band are omitted), the receiving groove 102 is formed in the widthwise end of the middle of the board 110 of the present invention, the receiving groove 102 Compression circuit 300 for compressing the patient's sternum is accommodated, the length adjusting unit 126 for adjusting the length of the chest band 118 according to the size of the patient's rib cage is fixed inside the middle of the board 110, The compression circuit 300 and the length adjuster 126 are arranged in the thoracic contraction part 116 (shown in FIG. 2) having a chestband 118 that tightens and contracts the rib cage when the compression circuit 300 compresses the sternum. Is connected by.

The rib cage 118 is detachably connected to surround the patient's chest by a connection (not shown). When the CPR device is not used, the chest band is separated from the connection part (not shown), and the compression circuit 300 is accommodated in the receiving groove 102 to be stored.

The board 110 is provided with a plurality of handles formed of grooves 104 formed along the edges thereof so that the carriers can hold and move by hand. Instead of the groove, a protruding handle or the like may be formed. The oxygen tank 106 is fixed to the upper surface of the board 110 by the band 108 so as to supply oxygen to the patient during ventilation and drive the compression device.

At the edge of the board 110, a thoracic band tightening function, a cardiopulmonary resuscitation function, a cardiopulmonary resuscitation function on-off function, and an operation selection switch 3 for turning on / off the operation of the continuous compression function are combined.

The thoracic band 118 is divided into left and right thoracic bands (196, 196 ') to surround the left and right sides of the patient's rib cage, respectively, to adjust the length of the rib cage (118) according to the size of the patient's rib cage The length adjusting means 126 is coupled to the support body.

The upper outer surface of the board 110 is provided with a supporting surface 128 of the shape that surrounds the subject by being opened in the longitudinal direction protruding from the left and right and lying on the subject. In the middle of the longitudinal direction in which the subject lies on the support surface 128, a recessed portion 129 which is lower retreat is formed. The recess 129 is formed in the horizontal direction in the same width as that of the rib cage 118. A long hole 129a is formed at the center of the recess 129, and the left and right lower ends of the right thoracic bands 122 and 124 fall into the inside of the board 110 through the long hole 129a. You will be wounded by Ubobin.

The length adjusting means 126, the base bracket 130 is installed inside the board 110, the support brackets 132, 134 (see Fig. 2) is set up at the front and rear ends of the base bracket 130, respectively. . In FIG. 2, only the front support bracket 132 is shown, and the rear support bracket 134 is located at the rear of the support bracket 132 and thus is not visible in the drawing (FIG. 2). The left and right shaft members 136 and 138 are installed between the support brackets 132 and 134, and the left and right chest ribs 122 and 124 are respectively wound around the left and right shaft members 136 and 138. Left and right bobbins (140, 142) are fitted, and the left and right shaft members (136, 138) are fixed to the electric gears (144, 146) of the spur gears meshing with each other, the right of the right shaft member (138) At the end, the electric gear 150, which is a bevel gear, is driven by a driving means.

As shown in FIG. 3, the driving means includes a chestband tightening cylinder 157 which generates a driving force to drive the pair of bobbins 140 and 142, and a piston rod of the chestband tightening cylinder 157 ( 154, a movable body 154 having a rack gear 152 reciprocating according to the operation of the chest band tightening cylinder 157, a guide member 156 for guiding the movable body 154, and the rack gear A pinion 155 that rotates in engagement with 152, a power transmission unit 150 that is coupled to the rotation shaft 151 of the pinion 155 to transmit rotational force to the bobbins 140 and 142, and the movable body 154. And a locking cylinder 149 having a locking ratchet 152 fixed to the side wall and a locker 184 that snaps the locking ratchet 152 to lock the movable body 154 in a predetermined position. The chest band tightening cylinder 157 is fixed to the fixing plate 153 as an air cylinder.

The piston rod 158 of the chest band tightening cylinder 157 is connected to the head of the moving body 154 by a connecting member 159. The head of the movable body 154 is fitted to the guide member 156 to slide.

The power transmission unit 150 has a structure in which a plurality of gears are bitten, and transmits the rotational motion of the pinion 155 to the bobbins 140 and 142 by changing the rotational speed and the rotational direction.

The locking ratchet 152 is a member fixed to the head of the movable body 154, the ratchet teeth are continuously formed in the longitudinal direction of the movable body.

Referring to the circuit configuration for controlling the CPR device having the above-described configuration using air pressure as follows.

4 is a configuration diagram of a drive control circuit of the cardiopulmonary resuscitation device according to the present invention.

First, each component constituting the drive control circuit will be described to facilitate understanding of the operation of the control circuit of FIG. 4. The first, third and ninth direction control valves 6, 11 and 34 are solenoid valves having only one direction control port (hereinafter referred to as a pilot) and two ports through which air pressure passes. The second, sixth and eighth directional control valves 7, 22 and 27 are solenoid valves having pilots on both sides and two ports through which air pressure passes, and directional control valves 5, 9, 13 and 21. , 23, 25, 28, 33, 39, 41, 42, 43 are solenoid valves with a pilot on one side and one port through which air pressure passes. In addition, the chest band tightening cylinder 157 and the rocker cylinder 149 are double-acting cylinders having return springs inside and moving forward and return by air pressure. The counters 26 and 31 receive and count the air pressure supplied to the port 'Z'. When the counter is counted a predetermined number of times, the counters 26 and 31 connect the port 'A' and the port 'P' and are reset through the port 'Y'.

The operation process of the compression circuit 300 and the breathing circuit 400 of the drive control circuit of the CPR device is as follows.

When air or oxygen as a power source is input (connected to the cardiopulmonary resuscitation device), the air pressure is adjusted through the pressure regulator 1, and the regulated constant air pressure is composed of the compression circuit 300 and the breathing circuit 400. It is supplied to the control circuit.

The air pressure regulated via the pressure regulator 1 controls the second direction control valve 7 and the chest band loosening locker cylinder 14 for controlling the operation selector switch 3 and the chest band tightening cylinder 16. 10 directional control valve 34 for operating the third direction control valve 11, the pressure count counter 26, the respiratory frequency counter 31, the fifth direction control valve 41, the reset cylinder 35 for Is applied to the input side of.

The operation selector switch 3 is a tightening mode (“F”: FASTEN) to tighten the chest band, the number of times the operation of the thoracic compression cylinder 116 and the number of breaths of the breathing circuit 400 is compressed and breathed in FIG. 5A or 5B. Cardiopulmonary resuscitation mode ("CPR") to operate at a predetermined cycle in accordance with the operation cycle signal diagram, continuous compression mode ("CO": CONTINUOUS) to stop the operation of the breathing circuit 400, and operates at a set cycle in the CPR mode But it is configured to operate by selecting the breathing mode ("V": VENTILATION) to stop the operation of the chest compression cylinder 116, and the stop mode ("STP": STOP) to unlock the chest band. Here, the operation selection switch 3 is preferably a rotary switch.

When the operation mode switch 3 switches from the stop mode (“STP”) to the reset mode (“RE”: RESET), the air pressure is supplied to the 10th direction control valve 34 for controlling the reset cylinder 35. The pressure recovery counter 26 is reset by inputting the pilot to switch the port from 'A' to 'B' and operating the reset cylinder 35.

Switching from the reset mode (“RE”) of the operation selector switch 3 to the tightening mode (“F”) opens the second direction control valve 7 for controlling the chest band tightening cylinder 157 (OPEN) port. Through 'B' the air pressure is supplied to the chest band tightening cylinder (16) to advance.

Advancing the chest band tightening cylinder 157 also advances the rack gear 62 of FIG. 2 connected to the shaft of the chest band tightening cylinder 157 simultaneously to rotate the pinion 68 to tighten the chest band. Then, the third direction control valve 11 of the rocker cylinder 149 is operated to supply air pressure, and after the predetermined time (seconds) has elapsed by the timer circuits 12, 13a, and 13, the locker cylinder 149 for preventing chest band loosening. Advance) Accordingly, the locking ratchet 82 is locked so as not to be released during the chest compression period. Here, the timer circuit is composed of a flow regulator 12, an air tank 13a, the direction control valve (13).

When switching from the tightening mode (“F”) of the operation selection switch 3 to the continuous pressure mode (“CO”), the fourth directional control valve 39 is normally closed from the normally open state. The air pressure is not input to the 'Z' port of the pressure counter 26 so that the pressure counter 26 does not count. Then, the air pressure passing through the shuttle valve 40 passes through the 'A' port of the directional control valve 22 to the eighth after a predetermined time in the timer circuit composed of the flow regulator 20 and the directional control valve 21 By operating the pilot of the direction control valve 22, the air pressure passing through the shuttle valve 40 passes through the 'B' port. The air pressure passing through the 'B' port is opened in the normally closed state of the direction control valve 25 after a predetermined time has elapsed in a timer circuit composed of the flow regulator 24 and the direction control valve 25. Switch to). At this time, the thoracic compression cylinder 116 is turned on and off by operating the first direction control valve 6 through the seventh direction control valve 5 in the air pressure which is normally open. Here, the first and seventh direction control valves 5 and 6 are solenoid valves returned after the passage of air pressure. That is, the air pressure for operating the pulse type on (cylinder press) / off (cylinder return) generated from the control circuit composed of the eighth directional control valve 22 and the timers 20, 21, 24, 25 is Passing through the fourth direction control valve 39 is blocked. Accordingly, by blocking the control air pressure applied to the 'Z' port of the pressure recovery counter 26, the control direction control valve 6 is opened and closed continuously, and consequently, the chest compression cylinder 116 is also continuously pressed. .

When switching from the continuous press mode (“CO”) of the operation selector switch (“CO”) to the CPR mode (“CPR”), the ninth directional control valve 23 is normally open through the shuttle valve 4. ) And passes through port 'A' of the eighth directional control valve 22 via the ninth directional control valve 23 and the shuttle valve 40. Then, after the predetermined time has elapsed by the timer circuit composed of the flow regulating valve 20, the air tank 20a, and the directional control valve 21, the left pilot of the eighth directional control valve 22 is operated. The direction control valve 22 is switched to the port 'B'. Subsequently, one air pressure branched from the air pressure passing through the port 'B' of the eighth directional control valve 22 passes through the seventh directional control valve 5 in a normally open state. The control valve 6 is operated to advance the chest compression cylinder 116 to perform chest compression. Further, another air pressure branched from the port 'B' of the eighth directional control valve 22 is passed by a timer circuit composed of the flow control valve 24, the air cylinder, and the directional control valve 25. Then, the right pilot of the eighth direction control valve 22 is operated to switch the eighth direction control valve 22 back to the 'A' port. At this time, the air pressure applied to the first directional control valve 6 is cut off, so the chest compression cylinder 116 is returned by the internal spring pressure to turn off chest compression. Thereafter, the air pressure from the shuttle valve 40 passes through a timer circuit composed of the flow control valve 20, the air tank 20a, and the directional control valve 21, and after the predetermined time passes, the eighth directional control valve. Switch (22) back to port 'B'. This operation is repeated continuously in one cycle as shown in FIG. 5A or 5B.

One of the signals supplied to the right pilot of the eighth directional control valve 22 among the continuously repeated pressing and returning air pressures is applied to the 'Z' port of the pressing frequency counter 26 to count and the predetermined pressing times (For example, '15 times' in FIG. 5A or '5 times' in FIG. 5B), the' P 'port and the' A 'port are connected to the pressure counter 22. Accordingly, the air pressure applied to the 'P' port flows to the 'A' port to operate the ninth directional control valve 23 so as to continuously press and return to the eighth directional control valve 22 and the timer circuit 20. , 21, 24, 25 by shutting off the air pressure supplied to the pulse form of ON (cylinder compression) / OFF (cylinder return) is stopped, from this time the breathing circuit 400 is operated.

Another one of the air pressure flowing from the 'P' port to the 'A' port opens the fifth directional control valve 41 of the breathing control circuit 2 to supply air pressure to the sixth directional control valve 27. The passed air pressure is applied to the exhaust timer circuit 42, and after a predetermined time has elapsed, the left pilot of the sixth directional control valve 27 is operated to switch to port 'B'. One air pressure passing through the port 'B' operates the direction control valve 33 to supply respiratory oxygen, and another air pressure branched after passing through the port 'B' passes through the intake timer circuit 43 in advance. After the set time has elapsed, the right pilot of the sixth directional control valve 27 is operated to switch to the port 'A'. At this time, since the air pressure to the direction control valve 33 is blocked, the breathing is stopped, and this operation is repeated continuously in one cycle.

The air pressure branched from the air pressure supplied to the left pilot of the sixth directional control valve 27 after a predetermined time elapses from the exhaust timer circuit 42 among the continuously repeated breaths and air pressures that stops breathing is a respiratory frequency counter. Apply to 'Z' port of (31) to perform the counting. When the counting time reaches a preset breathing frequency (for example, 'two times' in FIG. 5A or 'one time' in FIG. 5B), the air pressure applied to the 'P' port of the breathing frequency counter 31 is 'A' 'Flows to the port. Here, one air pressure branched from the 'A' port of the respiratory frequency counter 31 is applied to the 'Y' port of the compression frequency counter 26 after a predetermined time has elapsed by the timer 28, and the compression frequency counter 26 ). Accordingly, the air pressure applied to the fifth directional control valve 41 is cut off, the operation of the breathing circuit 400 is stopped, and at the same time, the pressure from the 'P' port of the pressure counter 26 to the 'A' port. Since the flow is blocked and the ninth directional control valve 23 is opened again, the pressing circuit 300 performs the pressing and return.

The above-described control operation is repeated continuously as one cycle in CPR mode ("CPR").

From the CPR mode (“CPR”) of the operation selector switch 3 to the breathing mode (“V”) where the cardiopulmonary resuscitation mode is activated and the breathing is performed twice, the seventh direction The control valve 5 is switched from the normally open state to the closed state to stop the thoracic compression cylinder 116. At the same time, the air pressure passing through the shuttle valve 4 passes through the ninth directional control valve 23 and the shuttle valve 40, and operates the left pilot of the eighth directional control valve 22 after a predetermined time elapses. Switch to 'B'. Then, the air pressure is input to the pressure counter 26 after a predetermined time by the timer composed of the flow control valve 24, the air reservoir, the direction control valve 25 is operated. When the compression count counter 26 completes counting, the operation of the compression circuit 300 is stopped and the breathing circuit 400 operates to perform two breaths.

As described above, the breathing mode is different from the cardiopulmonary resuscitation mode (“CPR”), except that the operation of the thoracic compression cylinder 116 is stopped, and the remaining operations are the same.

On the other hand, when switching from the breathing mode ("V") of the operation selector switch 3 to the stop mode ("STP"), the control function is released as the air pressure of the compression circuit 300 and the breathing circuit 400 escapes. Stop, and operate the right pilot of the second directional control valve (7) to pass through the timer circuit consisting of the flow regulator (8), the air cylinder, the directional control valve (9), so that after a predetermined time elapses the chest band tightening cylinder (157) After returning, the chest band is released, and the locker cylinder 149 is returned after the predetermined time has elapsed by the timer circuit composed of the flow regulator 12, the air cylinder, and the direction control valve 13 to release the locking.

By this configuration, the tightening mode ("F") for tightening the chest band, the CPR mode ("CPR") for operating the operation frequency of the thoracic compression cylinder and the breathing frequency of the breathing circuit in a predetermined cycle, and the operation of the breathing circuit Continuous pressure mode ("CO") to stop the operation, CPR mode to perform a predetermined cycle to perform the resuscitation mode, stop the operation of the thoracic compression cylinder to perform the breathing operation ("V"), and locking the chest band According to the selection of the stop mode ("STP") for releasing, it is possible to operate the chest compression cylinder, the chest band tightening cylinder, the rocker cylinder using the artificial respiration function by the pneumatic circuit.

As described above, according to the present invention, there is provided a drive control circuit of the CPR device configured to easily control the thoracic compression and respiration of the CPR device using air pressure.

Claims (15)

Thoracic compression cylinder with a piston to squeeze the sternum of the subject, a thorax band tightening cylinder to tighten the thorax band to tighten and shrink the thorax when the compression cylinder presses the sternum, and a rocker cylinder to maintain the tightening state of the thorax band In the drive control circuit of the cardiopulmonary resuscitation apparatus provided with, Pneumatic tank to accumulate air pressure, A first directional control valve which opens and closes to connect the pneumatic tank and the chest compression cylinder to on / off, a second directional control valve which opens and closes to connect the pneumatic tank to the chest band tightening cylinder on / off, and A third direction control valve which opens and closes to connect the pneumatic tank and the rocker cylinder to on / off, a pressure counter valve for counting the number of times the first direction control valve is operated, and an opening and closing input port of the pressure counter valve. A compression circuit having a four-way control valve; By operating the air pressure output when the set count of the pressure counter valve is completed, the fifth direction control valve connected to the pneumatic tank and the air pressure output from the fifth direction control valve are input at regular intervals. A breathing circuit having a sixth direction control valve to be opened and closed and a breathing counter valve counting an input frequency of air pressure input when the sixth direction control valve is opened and closed; A tightening mode for tightening the chest band, a cardiopulmonary resuscitation mode for operating the operation of the compression circuit and the operation of the breathing circuit at predetermined times, a continuous compression mode for stopping the operation of the breathing circuit, and the cardiopulmonary resuscitation mode Has a breathing mode for stopping the operation of the thoracic compression cylinder and a stop mode for stopping the CPR mode, by selecting one of the modes to control the opening and closing of each valve constituting the compression circuit and the breathing circuit A drive control circuit for a CPR device comprising an operation selection switch. The method of claim 1, The press circuit, A seventh directional control valve for opening and closing the output of the first directional control valve, a first shuttle valve for outputting one of air pressure generated when one of the cardiopulmonary resuscitation mode and the respiration mode is selected, and the first A second shuttle valve for outputting one of the air pressure output from the shuttle valve and the air pressure generated when the continuous pressure mode is selected, an eighth direction control valve for periodically opening and closing the seven-way control valve, and the first A ninth directional control valve connected between the shuttle valve and the second shuttle valve; The eighth directional control valve is an input port connected to the output port of the second shuttle valve, a first output port connected to one direction control port through a timer circuit, and is connected to the other direction control port through a timer circuit. And a second output port, wherein the other direction control port is connected to an input port of the compression count counter through the fourth direction control valve. The method of claim 2, One direction control port of the second direction control valve is connected to the tightening mode of the operation selection switch, the other direction control port is connected to the stop mode of the operation selection switch, and the continuous pressing mode of the operation selection switch is the first mode. It is connected to the direction control port of the four-way control valve, the CPR mode of the operation selection switch is connected to one port of the first check valve, the breathing mode of the operation selection switch is the direction control of the seventh direction control valve And a port connected to the other port of the first check valve. The method of claim 1, And an output port of the second direction control valve is connected to the direction control port of the direction control valve of the chest band tightening cylinder and the locking cylinder. The method of claim 2, The pressure counter may include a 'Z' port to which an output port of the eighth directional control valve is connected, a direction control port of a ninth direction control valve provided in the compression circuit, and a direction of a fifth direction control valve provided in the breathing circuit. 'A' port connected to the control port, and 'P' port connected to the pneumatic tank, the 'A' port and the '' when the predetermined number of times by counting the air pressure input to the 'Z' port And a P 'port to stop the operation of the compression circuit. The method of claim 1, The respiratory frequency counter is connected to the 'Z' port through which the air pressure output from the sixth directional control valve is input, the 'A' port connected to the 'Y' port for resetting the compression frequency counter, and the pneumatic tank. It has a 'P' port, and counting the air pressure input to the 'Z' port to reset the compression frequency counter by connecting the 'A' port and the 'P' port when the predetermined number of times Driving control circuit of CPR device. The method of claim 1, And said operation selection switch is a rotary switch. The method of claim 1, And a timer circuit for inputting the air pressure output from the second directional control valve to the thoracic band tightening cylinder after a predetermined time has elapsed. The method of claim 1, And a timer circuit for transmitting the output air pressure of the third directional control valve to the rocker cylinder after a predetermined time elapses. The method of claim 1, A timer circuit for inputting air pressure output from one path of the sixth directional control valve to the one direction control port of the sixth directional control valve after a predetermined time and air output from the other path of the sixth directional control valve And a timer circuit for inputting a pressure to the other direction control port of the sixth direction control valve after a predetermined time has elapsed. The method of claim 2, A timer circuit for inputting air pressure output from one path of the eighth direction control valve to the one direction control port of the eighth direction control valve after a predetermined time and air output from the other path of the eighth direction control valve; And a timer circuit for outputting pressure to the other direction control port of the eighth direction control valve and the 'Z' port of the compression count counter after a predetermined time elapses. The method of claim 1, And a pressure regulator for maintaining the input air pressure at a constant pressure. The method of claim 1, The first and third direction control valves are solenoid valves having a direction control port on one side and two ports through which air pressure passes, and the driving control circuit of the CPR device. The method of claim 2, And the second, sixth, and eighth directional control valves are solenoid valves having directional control ports at both sides and two ports through which air pressure passes. The method of claim 2, The fourth, fifth, seventh, and ninth directional control valves are solenoid valves having a direction control port on only one side and one port through which air pressure passes, and the driving control circuit of the CPR device.

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